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Finding the Fourth Proportional to 2,907.90, 4,016.28 and 1,917.68

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Solution

The fourth proportional to 2,907.90, 4,016.28 and 1,917.68 is: 2,648.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,907.90 : 4,016.28 = 1,917.68 : x
  2. Step 2: Convert to fraction form
    2,907.90/4,016.28 = 1,917.68/x
  3. Step 3: Cross multiply
    2,907.90x = 4,016.28 × 1,917.68
  4. Step 4: Simplify right side
    2,907.90x = 7,701,926.94
  5. Step 5: Solve for x
    x = 7,701,926.94/2,907.90
  6. Step 6: Final answer
    x = 2,648.62

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.